A study in Diabetes Care showed that women with type 2 diabetes were at an increased risk for a "more aggressive" type of breast cancer, compared with those who do not have diabetes. Researchers studied 7,834 women with and without diabetes, mean age of 71, and found that those with diabetes had a more advanced tumor stage and grade, larger tumors, were less likely to have progesterone receptor-negative breast tumors and tended to have more lymph nodes affected than those without diabetes.